This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 5 |
| 3 | 6 |
| 4 | 7 |
| 5 | 8 |
| 6 | 9 |
| 7 | 22 |
| 8 | 202 |
| 9 | 232 |
| 10 | 252 |
| 11 | 262 |
| 12 | 282 |
| 13 | 292 |
| 14 | 414 |
| 15 | 444 |
| 16 | 454 |
| 17 | 464 |
| 18 | 474 |
| 19 | 484 |
| 20 | 494 |
| 21 | 626 |
| 22 | 666 |
| 23 | 686 |
| 24 | 696 |
| 25 | 808 |
| 26 | 828 |
| 27 | 858 |
| 28 | 878 |
| 29 | 888 |
| 30 | 898 |
| 31 | 20002 |
| 32 | 20602 |
| 33 | 20802 |
| 34 | 20902 |
| 35 | 21612 |
| 36 | 21712 |
| 37 | 21812 |
| 38 | 21912 |
| 39 | 22622 |
| 40 | 22722 |
| 41 | 22822 |
| 42 | 22922 |
| 43 | 23632 |
| 44 | 23732 |
| 45 | 23832 |
| 46 | 23932 |
| 47 | 24642 |
| 48 | 24742 |
| 49 | 24842 |
| 50 | 24942 |